//
//  SwizzlingViewController.m
//  runtime
//
//  Created by eport on 2020/12/13.
//

#import "SwizzlingViewController.h"

@interface SwizzlingViewController ()

@end

@implementation SwizzlingViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor whiteColor];
    
    NSString *obj = nil;
    NSMutableArray *array = [NSMutableArray array];
    [array addObject:@"jack"];
    [array insertObject:obj atIndex:0];
    
    NSLog(@"---%@",array);
    
}



@end
